ECS Quick start Template

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  
  "Description" : "Amazon ECS Preview Quickstart Template",
  
  "Parameters" : {

    "ClusterName": {
      "Description" : "Name of your Amazon ECS Cluster",
      "Type" : "String",
      "ConstraintDescription" : "must be a valid Amazon ECS Cluster.",
      "Default" : "default"
    },

      
    "KeyName": {
      "Description" : "Name of an existing EC2 KeyPair to enable SSH access to the instance",
      "Type": "AWS::EC2::KeyPair::KeyName",
      "ConstraintDescription" : "must be the name of an existing EC2 KeyPair."
    },

    "InstanceType" : {
      "Description" : "Container Instance type",
      "Type" : "String",
      "Default" : "t2.micro",
      "AllowedValues" : [ "t2.micro", "t2.small", "t2.medium", "m3.medium", "m3.large", "m3.xlarge", "m3.2xlarge", "c3.large", "c3.xlarge", "c3.2xlarge", "c3.4xlarge", "c3.8xlarge", "r3.large", "r3.xlarge", "r3.2xlarge", "r3.4xlarge", "r3.8xlarge", "i2.xlarge", "i2.2xlarge", "i2.4xlarge", "i2.8xlarge", "hi1.4xlarge", "hs1.8xlarge", "cr1.8xlarge", "cc2.8xlarge" ]
,
      "ConstraintDescription" : "must be a valid EC2 instance type."
    },

    "SSHLocation" : {
      "Description" : " The IP address range that can be used to SSH to the EC2 instances",
      "Type": "String",
      "MinLength": "9",
      "MaxLength": "18",
      "Default": "0.0.0.0/0",
      "AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "ConstraintDescription": "must be a valid IP CIDR range of the form x.x.x.x/x."
    } 
  },
  
  "Mappings" : {
    "AWSInstanceType2Arch" : {
      "t2.micro"    : { "Arch" : "HVM64"  },
      "t2.small"    : { "Arch" : "HVM64"  },
      "t2.medium"   : { "Arch" : "HVM64"  },
      "m3.medium"   : { "Arch" : "HVM64"  },
      "m3.large"    : { "Arch" : "HVM64"  },
      "m3.xlarge"   : { "Arch" : "HVM64"  },
      "m3.2xlarge"  : { "Arch" : "HVM64"  },
      "c3.large"    : { "Arch" : "HVM64"  },
      "c3.xlarge"   : { "Arch" : "HVM64"  },
      "c3.2xlarge"  : { "Arch" : "HVM64"  },
      "c3.4xlarge"  : { "Arch" : "HVM64"  },
      "c3.8xlarge"  : { "Arch" : "HVM64"  },
      "r3.large"    : { "Arch" : "HVM64"  },
      "r3.xlarge"   : { "Arch" : "HVM64"  },
      "r3.2xlarge"  : { "Arch" : "HVM64"  },
      "r3.4xlarge"  : { "Arch" : "HVM64"  },
      "r3.8xlarge"  : { "Arch" : "HVM64"  },
      "i2.xlarge"   : { "Arch" : "HVM64"  },
      "i2.2xlarge"  : { "Arch" : "HVM64"  },
      "i2.4xlarge"  : { "Arch" : "HVM64"  },
      "i2.8xlarge"  : { "Arch" : "HVM64"  },
      "hi1.4xlarge" : { "Arch" : "HVM64"  },
      "hs1.8xlarge" : { "Arch" : "HVM64"  },
      "cr1.8xlarge" : { "Arch" : "HVM64"  },
      "cc2.8xlarge" : { "Arch" : "HVM64"  }
    },

    "AWSRegionArch2AMI" : {
      "us-east-1"      : { "HVM64" : "ami-34ddbe5c"  }
    }

  },

  "Resources" : {

    "ContainerInstance" : {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "IamInstanceProfile" : { "Ref" : "ECSIamInstanceProfile" },
        "ImageId" : { "Fn::FindInMap" : [ "AWSRegionArch2AMI", { "Ref" : "AWS::Region" },
                          { "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" }, "Arch" ] } ] },
        "InstanceType"   : { "Ref" : "InstanceType" },
        "SecurityGroups" : [ {"Ref" : "ECSQuickstartSecurityGroup"} ],
        "KeyName"        : { "Ref" : "KeyName" },
        "UserData"       : { "Fn::Base64" : { "Fn::Join" : ["", [
             "#!/bin/bash -xe\n",
             "echo ECS_CLUSTER=", { "Ref" : "ClusterName" },
             " >> /etc/ecs/ecs.config\n"
        ]]}}
      }
    },

    "ECSQuickstartSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "Enable HTTP access via SSH",
        "SecurityGroupIngress" : [
          {"IpProtocol" : "tcp", "FromPort" : "22", "ToPort" : "22", "CidrIp" : { "Ref" : "SSHLocation"}}
        ]
      }
    },

    "ECSIamInstanceProfile" : {
      "Type" : "AWS::IAM::InstanceProfile",
      "Properties" : {
        "Path" : "/",
        "Roles" : [{ "Ref" : "ECSQuickstartRole" }]
      }
    },

    "ECSQuickstartRole" : {
      "Type" : "AWS::IAM::Role",
      "Properties" : {
        "AssumeRolePolicyDocument": {
          "Version" : "2012-10-17",
          "Statement" : [ {
            "Effect" : "Allow",
            "Principal" : {
              "Service" : [ "ec2.amazonaws.com" ]
            },
            "Action" : [ "sts:AssumeRole" ]
          } ]
       },
      "Path" : "/",
      "Policies" : [ {
        "PolicyName" : "ECSQuickstart",
        "PolicyDocument": {
          "Version" : "2012-10-17",
          "Statement" : [ {
            "Effect" : "Allow",
            "Action" : "ecs:*",
            "Resource" : "*"
          } ]
       }
       } ]
      }
    }
  },

  "Outputs" : {
    "ECSInstance" : {
      "Description" : "Location for Amazon ECS Instance",
      "Value" : { "Fn::Join" : ["", ["ssh ec2-user@", { "Fn::GetAtt" : [ "ContainerInstance", "PublicDnsName" ]}]] }
    }
  }
}

Reference:

https://s3.amazonaws.com/amazon-ecs-cloudformation/Amazon_ECS_Quickstart.template